Sajjad Haider

King Saud University

Dr. Sajjad Haider is an Associate Professor in the Department of Chemical Engineering, King Saud University, Riyadh, Saudi Arabia. He received his MSc in 1999 and M Phil in 2004 from the Institute of Chemical Sciences, University of Peshawar, KPK, Pakistan, and his Ph.D. degree in 2009 from the Department of Polymer Science and Engineering, Kyungpook National University, Taegu, South Korea. His research focuses on electrospun nanofibers, biopolymer composites, metal oxide/polymer composites, and polymer hydrogels to develop scaffolds for tissue engineering, drug delivery, and water treatment applications.

6books edited

2chapters authored

Latest work with IntechOpen by Sajjad Haider

This book gives a current review of the links between the structure and function of hydrolases and ligases, as well as ideas for better using these critical enzymes. The book is split into two sections: “Cleavage” and “Ligases.” These enzymes are the biggest and most varied family of enzymes, allowing researchers to investigate the structural variety that underpins their different biological roles. In light of recent scientific advances, there is a desire to examine and update our knowledge of these enzymes’ functional and structural changes.

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Hydrolases

Edited by Sajjad Haider

Books edited

By Sajjad Haider, Yasin Khan, Waheed A. Almasry and Adnan Haider

Part of the book: Thermoplastic

Electrohydrodynamic Processes and Their Affecting Parameters

By Sajjad Haider, Adnan Haider, Abdulaziz A. Alghyamah, Rawaiz Khan, Waheed A. Almasry and Naeem Khan

Electrohydrodynamic processes such as electrospinning and electrospraying are simple, flexible, and cost-effective. Both processes use electrically charged jet of polymer solution for the fabrication of micro- or nanofibers and micro- or nanoparticle. Both of these electrodynamic techniques have been receiving increasing attention not only in the scientific community but also in industry. These fibers and particles offer several morphological and functional features that are suitable for tissue engineering in biomedical applications. The main apparatus used for both of these processes is almost the same. Both need electric voltage to induce charge on the droplet, which at optimized electric field leads to micro- or nanofibers and micro- or nanoparticles. Rayleigh in 1882, for the first time, theoretically estimated the maximum amount of charge that a liquid droplet could carry to change in a jet. This theory is now known as the “Rayleigh limit.” He predicted that a droplet on reaching Rayleigh limit would move as fine jets of liquid. More than 100 years later, Rayleigh limit theory was confirmed experimentally. Beside electric field there are other operating and solution parameters that need to be optimized before we obtain a desire product.

Part of the book: Electrospinning and Electrospraying